The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

A hidden three-foot-wide house separates these two regal churches.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

Famously misunderstood wonder of the ancient world

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Follow the original medieval paths that wind through this intriguing section of the city.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Baroque celebration of the end of the Great Plague of Vienna.

The topiary maze at the Habsburg hunting lodge.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

This abandoned five-star hotel is now a five-star urban exploration destination.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A unique seaside cave where Aleister Crowley faked his own death.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Macabre astrological automaton clock dating to the late 1400s.

The first museum in the world devoted to sexual gadgetry.